HartsfieldâJackson Atlanta International Airport has been the world's busiest airport every year since 2000; with all airports combined London has the world's busiest city airport system by passenger count.
Tension or Temperature. Dogs may shake as a way of relieving tension. If a dog is feeling nervous or uncomfortable in a situation, it might shake the whole body as a way of shaking out tension. This behavior also may function as a means of getting attention from other dogs or people.
The end result is an even more freaked out dog because he has learned he will get attention when he freaks. Try to ignore the theatrics tonight, and say nothing. Shaking and shivering is a normal, panic attack reaction the dog must go through to learn he really can deal with the noise. A little pat here and there when the dog comes to you is fine, but no talking.